Premier Magnesia, LLC Employee Directory
Chemical ManufacturingNorth Carolina, United States51-200 Employees
Premier Magnesia, LLC operates as a chemical manufacturer focused on magnesia-based products for agricultural, industrial, and environmental markets. It ranks among global leaders in producing high-purity calcined magnesium oxide and magnesium hydroxide, and its Giles Chemical Division is the largest producer of magnesium sulfate in North America. The company and its predecessors have owned and operated a magnesia mine and processing plant in Gabbs, Nevada for more than five decades, providing what is described as the United States’ only domestically mined magnesia ore source for the foreseeable future. Based in Waynesville, North Carolina, Premier Magnesia serves customers across dozens of applications seeking consistent quality and reliable supply. In 2025 the company became part of Martin Marietta Materials through an acquisition completed in July.